Adjust sensitivity (for everything (sonar, accelerometer, wearable, etc.)) AFTER SLEEP.
Sometimes, even when tracking with my wearable (but usually with accelerometer, and mostly with sonar), the deep sleep percent can be more than 90 percent, with many tiny stages of REM. It changes sometimes if I move a lot or a little when falling asleep, or if I wake up and move too much. Sometimes I trim out high movement to make the rest smooth, but it doesn’t always fix it.
I understand this doesn’t happen often, and we might sometimes be wrong in changing it like this, as Sleep as Android is usually accurate. Also, it may be ignored anyway (counted as an error/artifact/one-time-only) when processed on the statistics panel.